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Chapter 11 System Management
11.2 Functions in the Action Area for System
ETERNUS Web GUI User’s Guide
Copyright 2013 FUJITSU LIMITED P2X0-1090-10ENZ0
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2 Specify the parameters, and click the [Set] button.
● Setup Subsystem Parameters
• Load Balance
Set whether to enable or disable the load balance for the ETERNUS DX Disk storage system.
When load balance is enabled and the ETERNUS DX Disk storage system is overloaded, the ETERNUS
DX Disk storage system responds with the sense that is specified in the "Load Balance Response"
field described in "9.2.5.3 Modify Host Response" (page 589)
.
If the load balance is disabled, the warning sense response is suppressed and the ETERNUS DX Disk
storage system does not respond to any host connecting to the storage system.
• Reject INQUIRY from Unauthorized Host
Select whether to reject the "Inquiry" command from an unauthorized host. Select "Enable" to reject.
When the "Inquiry" command is rejected, ETERNUS DX Disk storage system returns an Affinity Error
(5/25/81) for the "Inquiry" command from the unauthorized host. When the command is not
rejected, the ETERNUS DX Disk storage system responds normally.
• Thin Provisioning Allocation Mode
Select "TPP balancing" or "TPV balancing" for the allocation mode of Thin Provisioning.
This mode is applied only for Thin Provisioning pools. Note that this setting is not applied for pools
that are created by the Flexible Tier (automatic storage layering) function.
- TPP balancing
Physical area is allocated almost evenly from the RAID groups that configure a TPP. Allocation is
performed in order of writing to the TPV. This is a conventional method.
- TPV balancing
Physical area is allocated almost evenly from the RAID groups that configure a TPP. Allocation is
performed by distributing RAID groups evenly for each TPV.
• Load balance for all hosts is disabled when "Disable" is selected for "Load Balance". If the
ETERNUS DX Disk storage system is in overload in this status, the warning sense response is
suppressed.
• When connecting the ETERNUS DX Disk storage system and HP-UX hosts, disable the Load
Balance setting. If "Enable" is selected for "Load Balance", incorrect logs may be recorded in the
host.
• Load balancing by Multipath Driver is operated regardless of whether the "Load Balance" of
this function is enabled/disabled.
When using the VERITAS Volume Manager Dynamic Multipathing (VxVM DMP), select "Enable".
When VxVM DMP is not used, the setting of this parameter does not affect the state of the
ETERNUS DX Disk storage system.